SOML Read: Rethinking the Read Operation Granularity of 3D NAND SSDs

Chun Yi Liu, Jagadish B. Kotra, Myoungsoo Jung, Mahmut T. Kandemir, Chita R. Das

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

NAND-based solid-state disks (SSDs) are known for their superior random read/write performance due to the high degrees of multi-chip parallelism they exhibit. Currently, as the chip density increases dramatically, fewer 3D NAND chips are needed to build an SSD compared to the previous generation chips. As a result, SSDs can be made more compact. However, this decrease in the number of chips also results in reduced overall throughput, and prevents 3D NAND high density SSDs from being widely-adopted. We analyzed 600 storage workloads, and our analysis revealed that the small read operations suffer significant performance degradation due to reduced chip-level parallelism in newer 3D NAND SSDs. The main question is whether some of the inter-chip parallelism lost in these new SSDs (due to the reduced chip count) can be won back by enhancing intra-chip parallelism. Motivated by this question, we propose a novel SOML (Single-Operation-Multiple-Location) read operation, which can perform several small intra-chip read operations to different locations simultaneously, so that multiple requests can be serviced in parallel, thereby mitigating the parallelism-related bottlenecks. A corresponding SOML read scheduling algorithm is also proposed to fully utilize the SOML read. Our experimental results with various storage workloads indicate that, the SOML read-based SSD with 8 chips can outperform the baseline SSD with 16 chips.

Original languageEnglish
Title of host publicationASPLOS 2019 - 24th International Conference on Architectural Support for Programming Languages and Operating Systems
PublisherAssociation for Computing Machinery
Pages955-969
Number of pages15
ISBN (Electronic)9781450362405
DOIs
Publication statusPublished - 2019 Apr 4
Event24th International Conference on Architectural Support for Programming Languages and Operating Systems, ASPLOS 2019 - Providence, United States
Duration: 2019 Apr 132019 Apr 17

Publication series

NameInternational Conference on Architectural Support for Programming Languages and Operating Systems - ASPLOS

Conference

Conference24th International Conference on Architectural Support for Programming Languages and Operating Systems, ASPLOS 2019
CountryUnited States
CityProvidence
Period19/4/1319/4/17

All Science Journal Classification (ASJC) codes

  • Software
  • Information Systems
  • Hardware and Architecture

Fingerprint Dive into the research topics of 'SOML Read: Rethinking the Read Operation Granularity of 3D NAND SSDs'. Together they form a unique fingerprint.

  • Cite this

    Liu, C. Y., Kotra, J. B., Jung, M., Kandemir, M. T., & Das, C. R. (2019). SOML Read: Rethinking the Read Operation Granularity of 3D NAND SSDs. In ASPLOS 2019 - 24th International Conference on Architectural Support for Programming Languages and Operating Systems (pp. 955-969). (International Conference on Architectural Support for Programming Languages and Operating Systems - ASPLOS). Association for Computing Machinery. https://doi.org/10.1145/3297858.3304035